I'm trying to get the number of images in an image collection in the Google Earth Engine (GEE) code editor. The image collection filteredCollection contains all Landsat 8 images on GEE that cover Greenwich (just an example).
The number of images is printed as 113 but it doesn't appear to be of type integer and I can't coerce it to an integer either. Here's what that looks like:
var imageCollection = ee.ImageCollection("LANDSAT/LC8_SR");
var point = ee.Geometry.Point([0.0, 51.48]);
var filteredCollection = imageCollection.filterBounds(point);
var number_of_images = filteredCollection.size();
print(number_of_images); // prints 113
print(number_of_images > 1); // prints false
print(+number_of_images); // prints NaN
print(parseInt(number_of_images, 10)); // prints NaN
print(Number(number_of_images)); // prints NaN
print(typeof number_of_images); // prints object
print(number_of_images.constructor); // prints <Function>
print(number_of_images.constructor.name); // prints Ik
var number_of_images_2 = filteredCollection.length;
print(number_of_images_2); // prints undefined
Any idea what's happening here and how I can get the number of images in the collection as an integer?
P.S.: Collection.size() is the recommended function for getting the number of images in the GEE docs.